1 files changed, 27 insertions, 0 deletions
diff --git a/fluent-bit/lib/librdkafka-2.1.0/packaging/cmake/try_compile/crc32c_hw_test.c b/fluent-bit/lib/librdkafka-2.1.0/packaging/cmake/try_compile/crc32c_hw_test.c
new file mode 100644
index 000000000..e80097803
--- /dev/null
+++ b/fluent-bit/lib/librdkafka-2.1.0/packaging/cmake/try_compile/crc32c_hw_test.c
@@ -0,0 +1,27 @@
+#include <inttypes.h>
+#include <stdio.h>
+#define LONGx1 "8192"
+#define LONGx2 "16384"
+void main(void) {
+        const char *n = "abcdefghijklmnopqrstuvwxyz0123456789";
+        uint64_t c0 = 0, c1 = 1, c2 = 2;
+        uint64_t s;
+        uint32_t eax = 1, ecx;
+        __asm__("cpuid" : "=c"(ecx) : "a"(eax) : "%ebx", "%edx");
+        __asm__(
+            "crc32b\t"
+            "(%1), %0"
+            : "=r"(c0)
+            : "r"(n), "0"(c0));
+        __asm__(
+            "crc32q\t"
+            "(%3), %0\n\t"
+            "crc32q\t" LONGx1
+            "(%3), %1\n\t"
+            "crc32q\t" LONGx2 "(%3), %2"
+            : "=r"(c0), "=r"(c1), "=r"(c2)
+            : "r"(n), "0"(c0), "1"(c1), "2"(c2));
+        s = c0 + c1 + c2;
+        printf("avoiding unused code removal by printing %d, %d, %d\n", (int)s,
+               (int)eax, (int)ecx);
+}